The M & R No. 1 is a chromium mine located in Sweet Grass county, Montana at an elevation of 5,751 feet.
About the MRDS Data:
All mine locations were obtained from the USGS Mineral Resources Data System. The locations and other information in this database have not been verified for accuracy. It should be assumed that all mines are on private property.
Mine Info
Elevation: 5,751 Feet (1,753 Meters)
Commodity: Chromium
Lat, Long: 45.475, -110.19917
Map: View on Google Maps
Satelite View
MRDS mine locations are often very general, and in some cases are incorrect. Some mine remains have been covered or removed by modern industrial activity or by development of things like housing. The satellite view offers a quick glimpse as to whether the MRDS location corresponds to visible mine remains.
M & R No. 1 MRDS details
Site Name
Primary: M & R No. 1
Commodity
Primary: Chromium
Location
State: Montana
County: Sweet Grass
District: Natural Bridge
Land Status
Not available
Holdings
Not available
Workings
Type: Surface/Underground
Ownership
Owner Name: U.S. Chrome Co.
Production
Not available
Deposit
Record Type: Site
Operation Category: Prospect
Operation Type: Unknown
Discovery Method: Ore-Mineral In Place
Years of Production:
Organization:
Significant: N
Physiography
General Physiographic Area: Rocky Mountain System
Physiographic Province: Middle Rocky Mountains
Mineral Deposit Model
Not available
Orebody
Form: IRREGULAR
Structure
Not available
Alterations
Not available
Rocks
Name: Pyroxenite
Role: Associated
Age Type: Associated Rock
Age Young: Neoproterozoic
Name: Pyroxenite
Role: Associated
Age Type: Host Rock
Age Young: Neoproterozoic
Analytical Data
Not available
Materials
Ore: Chromite
Comments
Comment (Location): THIS CLAIM IS PART OF A GROUP
Comment (Workings): THE CUT IS FOLLOWED BY A TUNNEL WHICH TAPERS OFF TO ABOUT 2 1/2 FT WIDE TO 3 FT HIGH IN THE END
Comment (Geology): THE DIKE MAY BE AN OFFSHOOT OF THE STILLWATER COMPLEX - A MAFIC LAYERED INTRUSION CAUSED BY GRAVITATIONAL DIFFERENTIATION
Comment (Commodity): THE WORK EXPOSES SOME CHROME ORE BUT IT IS NOT MUCH OF A SHOWING
References
Reference (Deposit): 1925 DIREXPL USFS
Principal Gold Districts of Montana
In Montana, 54 mining districts have each have produced more than 10,000 ounces of gold. The largest producers are Butte, Helena, Marysville, and Virginia City, each having produced more than one million ounces. Twenty seven other districts are each credited with between 100,000 and one million ounces of gold production. Read more: Principal Gold Districts of Montana.
